Dr. Conrad Murray, the physician who was attending to Michael Jackson on the day of the pop star's death, entered a plea of not guilty to involuntary manslaughter Tuesday in Los Angeles County Superior Court.

"Your honor, I am an innocent man," Murray said, adding, "Therefore, I plead not guilty," after being interrupted by Judge Michael Pastor.

A Los Angeles judge on Monday postponed the trial of Michael Jackson's personal physician until September at the request of defense, so as to allow for more time to fully prepare. Judge Michael Pastor made the ruling at the request of defense attorneys representing Dr. Conrad Murray.

The trial of Dr. Conrad Murray, the doctor charged in Michael Jackson's death, opened Tuesday. Jackson's parents and siblings arrived at the Los Angeles courtroom to watch the proceedings.

As prosecutors played an incredibly sad tape of Michael Jackson's voice, recorded just weeks before his death, coupled with a photo of his lifeless body, spectators in the Los Angeles courtroom looked pained. The King of Pop said: "We have to be phenomenal. When people leave this show, when people leave my show, I want them to say, 'I've never seen nothing like this in my life. Go. Go. I've never seen nothing like this. Go. It's amazing. He's the greatest entertainer in the world. I'm taking that money, a million children, children's hospital, the biggest in the world, Michael Jackson's Children's Hospital."'"